An Etymological Dictionary of Astronomy and AstrophysicsEnglish-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri - Paris Observatory

A surface of revolution obtained by rotating a closed plane curve about an axis parallel
to the plane which does not intersect the curve. The simplest toroid is the
→ torus.
The solid enclosed by such a surface.

A magnetic field which is generated in a → plasma
inside a → toroid,
as in a → tokamak, by the electric current which
spirals around the toroid. Toroidal field has no radial component.
→ poloidal magnetic field.